bytefield – Create illustrations for network protocol specifications

The byte­field pack­age helps the user cre­ate il­lus­tra­tions for
net­work pro­to­col spec­i­fi­ca­tions and any­thing else that uti­lizes
fields of data. Th­ese il­lus­tra­tions show how the bits and bytes
are laid out in a packet or in mem­ory.